Showing papers in "Physiological and Molecular Plant Pathology in 2005"

TL;DR: Results tend to confirm that wheat plants fed with Si can produce phytoalexins in response to powdery mildew infection.

TL;DR: Findings support an active participation, distinct from single-gene-defined resistance, for Si in the defense of rice against M. grisea and new insights into a potential active role for this ubiquitous element during non-genetically defined rice-blast resistance is suggested.

TL;DR: In phosphonate-treated Arabidopsis thaliana seedlings inoculated with zoospores of Phytophthora palmivora, the presence of Mn(III)-desferal, a treatment that quenches superoxide release, abolishes hypersensitive cell death and facilitates pathogen development in phosphonates-treated plants, indicates that pathogen inhibition is a consequence ofsuperoxide release rather than direct inhibition due to phosphate.

TL;DR: The results support the emerging role of jasmonate signalling in defence against necrotrophic fungal pathogens in monocots and future manipulation of this pathway may improve CR resistance in wheat.

TL;DR: Findings indicate that during plant defense responses, vitamin B6 functions and its synthesis is regulated in a manner consistent with this vitamin’s activity as an antioxidant and modulator of active oxygen species in vivo.

TL;DR: The various compounds detected in this study are discussed, in terms of their possible roles in plant defense against pathogen-stress, their metabolic pathways of synthesis, and their potential application for screening cultivars of wheat for resistance to FHB.

TL;DR: The ability of PvPGIP2 to limit fungal colonization in transgenic plants correlates with its inhibitory effect on BcPG1, and the potential of PGIPs and the encoding genes as biotechnological tools to control the phytopathogenic fungus B. cinerea is discussed.

TL;DR: Data strongly indicate that induction of plant defence response is the main mechanism of biological control mediated by the GM-EPC compost.

TL;DR: Application of SA or MeJA coordinately activated transcripts of different groups of defence-related proteins and reduced common bunt infection in wheat seedlings.

TL;DR: Nonanoic acid (NA) was very inhibitory to spore germination and mycelial growth of two cacao pathogens and may play a role in the successful use of some Trichoderma spp.

TL;DR: The results suggest that OsBIERF3 may play important roles in disease resistance response and salt tolerance.

TL;DR: It is argued that to omit pathogen challenge from attempts to quantify the costs of induced resistance will lead to an underestimation of such costs.

TL;DR: Observations suggest that in Arabidopsis, plant cell death during the HR is programmed but represents a variant of necrosis rather than apoptosis, and the differential effect of the inhibitor suggests an alternative source of H 2 O 2 to modify the plant wall.

TL;DR: Results suggest that motility but not flagellar component (s) is (are) involved in pathogenesis of E. carotovora.

TL;DR: Comparison of the sequence information obtained in this study with previous reports suggested that the ToxB gene is highly conserved across a geographically-diverse set of isolates.

TL;DR: The generation of an EST library represents the first step in a functional genomics approach aimed at elucidating the function of genes involved in ascochyta blight resistance and the pathway of their action, and applications of the EST library to microarray expression studies and molecular mapping are discussed.

TL;DR: This is the first study that closely follows the kinetics of individual extracellular phenolic compounds and the concurrent oxidative stress during the first few hours of a plant–bacterial interaction.

TL;DR: The expression of several stress-related genes during the infection process, including those for heat shock proteins, catalase 1, β-1,3-glucanase, wound inducing gene, and genes involved in photosynthesis, suggests their role in the susceptible potato–PVY NTN interaction.

TL;DR: It is concluded that Pen contains at least one unidentified elicitor, most likely a protein or a glycoprotein, inducing resistance via signal transduction pathways different from classical SA/NPR1- or JA/ethylene-dependent pathways.

TL;DR: CYP was much more concentrated in young apical leaves and roots compared to old basal leaves and few thousands and few hundred thousands CYP genome units per nanogram of plant DNA were the maximum amounts found in leaves and Roots, respectively.

TL;DR: Disruption of cel5A results in a strain with identical virulence as the wild-type on tomato leaves or gerbera petals, with no significant reduction in the extracellular s-1,4-glucanase activity, and with similar growth rate with carboxymethylcellulose or Avicel as the only carbon sources.

TL;DR: It is hypothesized that enhanced antioxidant enzyme catalase activity contributes to the inhibition of cell death in broad beans scavenging endogenous H 2 O 2 generated by B. cinerea infection and to elicitor-dependent production of anti-fungal component(s) by living host cells; as a consequence, red light-induced resistance may be established.

TL;DR: Results suggest that constitutive expression of the ech42 gene from T. harzianum could be exploited to enhance resistance to fungal pathogens in important forest tree species.

TL;DR: Arabidopsis Age-Related Resistance appears to be SA-independent, however the level of ARR resistance was somewhat reduced in these mutants in some experiments, suggesting there may be numerous defence pathways that contribute to adult plant resistance in Arabidopsis.

TL;DR: This review shows the current knowledge of major functions of HCs encoded by potyviruses and caulimoviruses, and the HC of Cauliflower mosaic virus plays an important role in aphid transmission, whereas no direct role in viral infectivity has so far been attributed to this protein.

TL;DR: RT-PCR was used to amplify stilbene synthase (STS) transcripts expressed in the grape–downy mildew interaction and identified that grapes have two CHS, one CHS-like and close to 25 STS single copy genes.

TL;DR: It is demonstrated that current proteomic and phosphoproteomic technologies have the potential to identify new components of regulatory pathways and elucidate their functions within a cellular context.

TL;DR: Correlations between the expression of defense genes with partial resistance and defense responses associated with accumulation of PR1a, MMP, IPER and β-1,3-endoglucanase (EGL) mRNAs may contribute to the partial resistance response to P. sojae in soybean.

TL;DR: Conidia of Penicillium expansum, the causal agent of blue mold decay on apple and pear fruit was found to be highly hydrophobic when young, whereas aged spores were mainly hydrophilic.